[BUG] Client ElixirLS - elx: connection to server is erroring.

[ibehnam]

I have tried installing Elixir+Erlang through Homebrew (as instructed by the official Elixir website): https://elixir-lang.org/install.html#macos

I also tried uninstalling them and installing through ASDF and I made sure that they both had the same version (27) as mentioned in this article: https://elixir-ko.github.io/install.html

This Issue mentions that Elixir may be incompatible with the most recent OpenSSL versions, but I don't want to downgrade OpenSSL: erlang/otp#4577 (comment). Also: https://elixirforum.com/t/elixirls-cannot-connect-to-server-in-vscode/55345/8

I also did every tip mentioned on the Github page of the Elixir LSP: https://github.com/elixir-lsp/elixir-ls?tab=readme-ov-file#troubleshooting

Several hours later, I still can't use the Elixir LSP in VSCode. This is the error I keep getting:

Client ElixirLS - elx: connection to server is erroring. Header must provide a Content-Length property. {"{\"jsonrpc\"":"\"2.0\",\"method\":\"window/logMessage\",\"params\":{\"message\":\"Running in /Users/<me>/Downloads/LLM/elx\",\"type\":3}}Content-Length: 130"} Shutting down server.

And

Client ElixirLS - elx: connection to server is erroring. Header must provide a Content-Length property. {"{\"jsonrpc\"":"\"2.0\",\"method\":\"window/logMessage\",\"params\":{\"message\":\"Started ElixirLS v0.21.3\",\"type\":3}}Content-Length: 121"} Shutting down server.

And

Client ElixirLS - elx: connection to server is erroring. Header must provide a Content-Length property. {"\u001b[6 qcontent-length":"103"} Shutting down server.

This isn't supposed to be like this, and a search on Google shows many people have this problem. I like Elixir and BEAM, but the tooling is not comparable to Rust, Haskell, Go, etc.

Even with Python (which has one of the worst toolings), all I need to do before using the language is:

1. Install Python through Homebrew or a binary.

2. Install the plugin on VSCode.

3. Profit.

[lukaszsamson]

Something is broken in your env. Installing stuff via homebrew usually leads to broken env. Especially in python land. I had too many problems with broken poetry or pyenv shims due to homebrew messing with python installs or my rc. Anyway, this thread contains some troubleshooting of similar problem elixir-lsp/vscode-elixir-ls#399. Please also verify that your problem is reproducible in devcontainer https://github.com/elixir-lsp/elixir-ls-devcontainer-example

[lukaszsamson]

Were you able to resolve your issue @ibehnam?

[lukaszsamson]

Closing for now

[yordis]

@lukaszsamson I was consistently getting this issue, turns out that was due to some WARNING printing I had in my dotfiles setup https://github.com/yordis/.dotfiles/blob/6f24bd6ff76bedcc5e83e1bec62dda4a675d6ccd/roles/zsh/files/__dotfiles.zsh#L2

Running /Users/ubi/.cursor/extensions/jakebecker.elixir-ls-0.24.2/elixir-ls-release/launch.sh
Preferred shell is zsh, relaunching
Looking for ASDF install
ASDF install found in /Users/ubi/.asdf/asdf.sh, sourcing
Installing ElixirLS release v0.24.1
Running in /Users/ubi/Developer/github.com/straw-hat-team/beam-monorepo
Install complete
[Error - 6:17:22 PM] Client ElixirLS - beam-monorepo: connection to server is erroring.
Header must provide a Content-Length property.
{"\u001b[1;33m[dotfiles":"WARNING] /Users/ubi/.mix/escripts does not exist\u001b[0m\n\u001b[1;33m[DOTFILES:WARNING] /Users/ubi/Developer/Flutter/bin does not exist\u001b[0m\n\u001b[1;33m[DOTFILES:WARNING] /Users/ubi/.deno/bin does not exist\u001b[0m\n\u001b[1;33m[DOTFILES:WARNING] /Users/ubi/.asdf/plugins/golang/set-env.zsh does not exist\u001b[0m\nContent-Length: 103"}
Shutting down server.
[Error - 6:17:22 PM] Stopping server failed
Error: Client is not running and can't be stopped. It's current state is: starting
	at fb.shutdown (/Users/ubi/.cursor/extensions/jakebecker.elixir-ls-0.24.2/out/extension.js:41:8499)